This data set is intended for use as an historical bathymetric data set for scientific research. It is not intended for navigational use. The data were originally used for bathymetric change and sediment budget analysis as part of the Southwest Washington Coastal Erosion Study (SWCES), a cooperative study by the US Geological Survey and the Washington State Department of Ecology.

Supplemental_Information:

The SWCES was initiated to examine coastal geology, processes, and natural hazards within the Columbia River littoral cell. The study is jointly directed by the U.S. Geological Survey Coastal and Marine Geology Program and the Washington State Department of Ecology Shorelands and Environmental Assistance Program, with active participation of local communities in Pacific and Grays Harbor counties. Related USGS work in the Southwest Washington Coastal Erosion Study can be found online at: <http://www.ecy.wa.gov/programs/sea/swce/>

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1996

Ending_Date: 1999

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -124.220284

East_Bounding_Coordinate: -123.942988

North_Bounding_Coordinate: 46.784657

South_Bounding_Coordinate: 46.550872

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: Hydrographic data

Theme_Keyword: Bathymetry

Theme_Keyword: Columbia River littoral cell

Theme_Keyword: Southwest Washington Coastal Erosion Study

Theme_Keyword: Bathymetric change

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: Southwest Washington

Place_Keyword: Northern Oregon

Place_Keyword: Pacific Ocean

Place_Keyword: Pacific Northwest

Place_Keyword: Grays Harbor

Place_Keyword: Willapa Bay

Place_Keyword: Columbia River

Place_Keyword: USA

Access_Constraints: None

Use_Constraints:

Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.

This information is not intended for navigational purposes.

Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Please recognize the U.S. Geological Survey (USGS) and the Southwest Washington Coastal Erosion Study (SWWCES) as the source of this information.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Ann E. Gibbs

Contact_Organization: USGS

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: 345 Middlefield Road MS999

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025

Country: USA

Contact_Voice_Telephone: 650-329-5060

Contact_Electronic_Mail_Address: agibbs@usgs.gov

Data_Set_Credit:

This project is jointly funded by the Washington State Department of Ecology and the US Geological Survey, Coastal Marine Geology Program. Considerable data were also provided by U.S. Army Corps of Engineers Portland District, Seattle District, and Waterways Experiment Station.

The data have been thoroughly analyzed for for gross inaccuracies.
A discussion of errors and accuracies associated with the original
data collection methodologies can be found in Gibbs and Gelfenbaum
(1999). Water depths have been modified as discussed in Buijsman et al. (2002)

Completeness_Report: The data set is considered complete.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal accuracies for NOS surveys vary by water depth and distance from shore (see Gibbs and Gelfenbaum, 1999).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Vertical accuracies for NOS surveys vary by water depth and distance from shore (see Gibbs and Gelfenbaum, 1999).

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: National Geophysical Data Center

Publication_Date: 1998

Title:

National Ocean Service Hydrographic Survey Data: US Coastal Waters

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Data announcement 98-MGG-03.

Issue_Identification: Version 4.0.

Publication_Information:

Publication_Place: Boulder, CO

Publisher: World Data Center for Marine Geology Geophysics,

Type_of_Source_Media: CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1851

Ending_Date: 1974

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: NOSHDB

Source_Contribution:

Data were aquired from this source or digitized by NGDC and provided to the SWWCES under contract to USGS.

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Army Corps of Engineers

Title: Grays Harbor and Columbia River entrance surveys

Process_Step:

Process_Description:

All sounding data equal to -9999 and/or with an original cartographic code not equal to 711 were eliminated from the data set. The data set was evaluated for gross inaccuracies and points that were obviously erroneous were given a cartographic code not equal to 711. Only soundings with a cartographic code should be considered useful for scientific analysis.